makes system notes less intrusive to a conversationless-intrusive-system-note

adds dicussion icon and color change in system note links

adds discussion icons and sticky note icon for other system notes for now

fixes scss lint error

adds faded commit lists

hides first paragraph in commit list box

css tweak for commit list system notes

adds commit-list toggle functionality, css tweaks and css classnames more readable

small css fix in header. makes links bold in system note

renames class no-shade to hide-shade

adds entry for this merge request in changelog

removes commented line

removes the avatar-icon from discussion header

minor css tweaks to make the commit list alignment with header text

uses monospaced font to make the commit list lined up with all

removes icon from system note and align bullet list

resolves scss lint warings

adds helper function to extract system note message from first p tag

adds helper functions to check commit list count and haml cleanup

adds changelog entry under 8.14

adds changelog entry with changelog cli

removes helper and regex and makes commit list li count using JS

makes link in system note normal

brakeman build failure resolved

fixing rspec test based on new design for discussion

shows system note in lowercase

removes extra spaces from comments

adds code commenting for functions

adds semi-colon in some lines

fixes rspec given when merge build success

removes commented codes

rewrite changelog yml file

moves isMetaKey to common utils file

fixes some indentation issues

removes unnecessary variables and resolves some discussions

replaces jQuery parent function with siblings

fixes scss issues and variable spelling mistake

uses constant rather using hardcoded number for visible li count in long commit list

makes system note header all lowercase

uses color variables and adjust gradient a little

some minor changes for adding css classes

renames functions name for readability

changes changelog title

minor scss newline changes

makes system note less intrusive to a conversation

8 files changed, 153 insertions, 28 deletions

diff --git a/app/assets/javascripts/lib/utils/common_utils.js b/app/assets/javascripts/lib/utils/common_utils.js
index 2a38ac28172..d83c41fae9d 100644
--- a/app/assets/javascripts/lib/utils/common_utils.js
+++ b/app/assets/javascripts/lib/utils/common_utils.js
@@ -125,6 +125,11 @@
       // Close any open tooltips
       $('.has-tooltip, [data-toggle="tooltip"]').tooltip('destroy');
     };
+
+    gl.utils.isMetaKey = function(e) {
+      return e.metaKey || e.ctrlKey || e.altKey || e.shiftKey;
+    };
+
   })(window);
 
 }).call(this);
diff --git a/app/assets/javascripts/notes.js b/app/assets/javascripts/notes.js
index 44079bc3ca3..6cb87f9ba81 100644
--- a/app/assets/javascripts/notes.js
+++ b/app/assets/javascripts/notes.js
@@ -12,7 +12,7 @@
   var bind = function(fn, me){ return function(){ return fn.apply(me, arguments); }; };
 
   this.Notes = (function() {
-    var isMetaKey;
+    const MAX_VISIBLE_COMMIT_LIST_COUNT = 3;
 
     Notes.interval = null;
 
@@ -33,6 +33,7 @@
       this.resetMainTargetForm = bind(this.resetMainTargetForm, this);
       this.refresh = bind(this.refresh, this);
       this.keydownNoteText = bind(this.keydownNoteText, this);
+      this.toggleCommitList = bind(this.toggleCommitList, this);
       this.notes_url = notes_url;
       this.note_ids = note_ids;
       this.last_fetched_at = last_fetched_at;
@@ -46,6 +47,7 @@
       this.setPollingInterval();
       this.setupMainTargetNoteForm();
       this.initTaskList();
+      this.collapseLongCommitList();
     }
 
     Notes.prototype.addBinding = function() {
@@ -81,10 +83,13 @@
       $(document).on("click", ".js-add-diff-note-button", this.addDiffNote);
       // hide diff note form
       $(document).on("click", ".js-close-discussion-note-form", this.cancelDiscussionForm);
+      // toggle commit list
+      $(document).on("click", '.system-note-commit-list-toggler', this.toggleCommitList);
       // fetch notes when tab becomes visible
       $(document).on("visibilitychange", this.visibilityChange);
       // when issue status changes, we need to refresh data
       $(document).on("issuable:change", this.refresh);
+
       // when a key is clicked on the notes
       return $(document).on("keydown", ".js-note-text", this.keydownNoteText);
     };
@@ -114,9 +119,10 @@
 
     Notes.prototype.keydownNoteText = function(e) {
       var $textarea, discussionNoteForm, editNote, myLastNote, myLastNoteEditBtn, newText, originalText;
-      if (isMetaKey(e)) {
+      if (gl.utils.isMetaKey(e)) {
         return;
       }
+
       $textarea = $(e.target);
       // Edit previous note when UP arrow is hit
       switch (e.which) {
@@ -156,10 +162,6 @@
       }
     };
 
-    isMetaKey = function(e) {
-      return e.metaKey || e.ctrlKey || e.altKey || e.shiftKey;
-    };
-
     Notes.prototype.initRefresh = function() {
       clearInterval(Notes.interval);
       return Notes.interval = setInterval((function(_this) {
@@ -263,6 +265,7 @@
         $notesList.append(note.html).syntaxHighlight();
         // Update datetime format on the recent note
         gl.utils.localTimeAgo($notesList.find("#note_" + note.id + " .js-timeago"), false);
+        this.collapseLongCommitList();
         this.initTaskList();
         this.refresh();
         return this.updateNotesCount(1);
@@ -433,9 +436,9 @@
       var $form = $(xhr.target);
 
       if ($form.attr('data-resolve-all') != null) {
-        var projectPath = $form.data('project-path')
-            discussionId = $form.data('discussion-id'),
-            mergeRequestId = $form.data('noteable-iid');
+        var projectPath = $form.data('project-path');
+        var discussionId = $form.data('discussion-id');
+        var mergeRequestId = $form.data('noteable-iid');
 
         if (ResolveService != null) {
           ResolveService.toggleResolveForDiscussion(projectPath, mergeRequestId, discussionId);
@@ -844,9 +847,9 @@
       return this.notesCountBadge.text(parseInt(this.notesCountBadge.text()) + updateCount);
     };
 
-    Notes.prototype.resolveDiscussion = function () {
-      var $this = $(this),
-          discussionId = $this.attr('data-discussion-id');
+    Notes.prototype.resolveDiscussion = function() {
+      var $this = $(this);
+      var discussionId = $this.attr('data-discussion-id');
 
       $this
         .closest('form')
@@ -855,6 +858,36 @@
         .attr('data-project-path', $this.attr('data-project-path'));
     };
 
+    Notes.prototype.toggleCommitList = function(e) {
+      const $element = $(e.target);
+      const $closestSystemCommitList = $element.siblings('.system-note-commit-list');
+
+      $closestSystemCommitList.toggleClass('hide-shade');
+    };
+
+    /**
+    Scans system notes with `ul` elements in system note body
+    then collapse long commit list pushed by user to make it less
+    intrusive.
+     */
+    Notes.prototype.collapseLongCommitList = function() {
+      const systemNotes = $('#notes-list').find('li.system-note').has('ul');
+
+      $.each(systemNotes, function(index, systemNote) {
+        const $systemNote = $(systemNote);
+        const headerMessage = $systemNote.find('.note-text').find('p:first').text().replace(':', '');
+
+        $systemNote.find('.note-header .system-note-message').html(headerMessage);
+
+        if ($systemNote.find('li').length > MAX_VISIBLE_COMMIT_LIST_COUNT) {
+          $systemNote.find('.note-text').addClass('system-note-commit-list');
+          $systemNote.find('.system-note-commit-list-toggler').show();
+        } else {
+          $systemNote.find('.note-text').addClass('system-note-commit-list hide-shade');
+        }
+      });
+    };
+
     return Notes;
 
   })();
diff --git a/app/assets/stylesheets/pages/notes.scss b/app/assets/stylesheets/pages/notes.scss
index 9bfa1c96a5d..cc16d83c210 100644
--- a/app/assets/stylesheets/pages/notes.scss
+++ b/app/assets/stylesheets/pages/notes.scss
@@ -35,11 +35,83 @@ ul.notes {
 
   .system-note {
     font-size: 14px;
-    padding-top: 10px;
-    padding-bottom: 10px;
-    background: #fdfdfd;
+    padding: 0;
+    clear: both;
+
+    &.timeline-entry::after {
+      clear: none;
+    }
+
+    .system-note-message {
+      text-transform: lowercase;
+
+      a {
+        color: $gl-link-color;
+        text-decoration: none;
+      }
+    }
+
+    .timeline-content {
+      padding: 14px 10px;
+    }
+
+    .note-body {
+      overflow: hidden;
+
+      .system-note-commit-list-toggler {
+        display: none;
+        padding: 10px 0 0;
+        cursor: pointer;
+      }
+
+      .note-text {
+        & p:first-child {
+          display: none;
+        }
+
+        &.system-note-commit-list {
+          max-height: 63px;
+          overflow: hidden;
+          display: block;
+
+          ul {
+            margin: 3px 0 3px 15px !important;
+
+            li {
+              font-family: $monospace_font;
+              font-size: 12px;
+            }
+          }
+
+          p:first-child {
+            display: none;
+          }
+
+          &::after {
+            content: '';
+            width: 100%;
+            height: 20px;
+            position: absolute;
+            left: 0;
+            bottom: 50px;
+            background: linear-gradient(rgba($gray-light, .3) 0, $white-light);
+          }
+
+          &.hide-shade {
+            max-height: 100%;
+            overflow: auto;
+
+            &::after {
+              background: transparent;
+            }
+          }
+        }
+      }
+    }
 
     .timeline-icon {
+      display: none;
+
       .avatar {
         visibility: hidden;
 
@@ -65,6 +137,12 @@ ul.notes {
     position: relative;
     border-bottom: 1px solid $table-border-gray;
 
+    &.note-discussion {
+      &.timeline-entry {
+        padding: 14px 10px;
+      }
+    }
+
     &.is-editting {
       .note-header,
       .note-text,
@@ -88,10 +166,8 @@ ul.notes {
         overflow: auto;
         word-wrap: break-word;
         @include md-typography;
-
         // Reset ul style types since we're nested inside a ul already
         @include bulleted-list;
-
         ul.task-list {
           ul:not(.task-list) {
             padding-left: 1.3em;
@@ -111,6 +187,11 @@ ul.notes {
       padding-bottom: 3px;
       padding-right: 20px;
 
+      p {
+        display: inline;
+        margin: 0;
+      }
+
       @media (min-width: $screen-sm-min) {
         padding-right: 0;
       }
@@ -238,6 +319,10 @@ ul.notes {
   }
 }
 
+.discussion-header {
+  font-size: 14px;
+}
+
 .note-headline-light,
 .discussion-headline-light {
   color: $notes-light-color;
diff --git a/app/views/discussions/_discussion.html.haml b/app/views/discussions/_discussion.html.haml
index 077e8e64e5f..e4b4ea675d2 100644
--- a/app/views/discussions/_discussion.html.haml
+++ b/app/views/discussions/_discussion.html.haml
@@ -1,9 +1,6 @@
 - expanded = discussion.expanded?
 %li.note.note-discussion.timeline-entry
   .timeline-entry-inner
-    .timeline-icon
-      = link_to user_path(discussion.author) do
-        = image_tag avatar_icon(discussion.author), class: "avatar s40"
     .timeline-content
       .discussion.js-toggle-container{ class: discussion.id, data: { discussion_id: discussion.id } }
         .discussion-header
@@ -13,9 +10,7 @@
                 = icon("chevron-up")
               - else
                 = icon("chevron-down")
-
               Toggle discussion
-
           = link_to_member(@project, discussion.author, avatar: false)
 
           .inline.discussion-headline-light
@@ -38,8 +33,6 @@
 
             = time_ago_with_tooltip(discussion.created_at, placement: "bottom", html_class: "note-created-ago")
 
-          = render "discussions/headline", discussion: discussion
-
         .discussion-body.js-toggle-content{ class: ("hide" unless expanded) }
           - if discussion.diff_discussion? && discussion.diff_file
             = render "discussions/diff_with_notes", discussion: discussion
diff --git a/app/views/projects/notes/_note.html.haml b/app/views/projects/notes/_note.html.haml
index afff15228c1..89ae64554c0 100644
--- a/app/views/projects/notes/_note.html.haml
+++ b/app/views/projects/notes/_note.html.haml
@@ -14,6 +14,9 @@
           = note.author.to_reference
           - unless note.system
             commented
+          - if note.system
+            %span{class: 'system-note-message'}
+              = h(note.note_html.downcase.html_safe)
           %a{ href: "##{dom_id(note)}" }
             = time_ago_with_tooltip(note.created_at, placement: 'bottom', html_class: 'note-created-ago')
         - unless note.system?
@@ -67,7 +70,9 @@
           = render 'projects/notes/edit_form', note: note
         .note-awards
           = render 'award_emoji/awards_block', awardable: note, inline: false
-
+        - if note.system
+          .system-note-commit-list-toggler
+            Toggle commit list
       - if note.attachment.url
         .note-attachment
           - if note.attachment.image?
diff --git a/changelogs/unreleased/less-intrusive-system-note.yml b/changelogs/unreleased/less-intrusive-system-note.yml
new file mode 100644
index 00000000000..87a5a3be246
--- /dev/null
+++ b/changelogs/unreleased/less-intrusive-system-note.yml
@@ -0,0 +1,4 @@
+---
+title: Make system notes less intrusive
+merge_request: 6755
+author:
diff --git a/spec/features/merge_requests/diff_notes_resolve_spec.rb b/spec/features/merge_requests/diff_notes_resolve_spec.rb
index d5e3d8e7eff..eab64bd4b54 100644
--- a/spec/features/merge_requests/diff_notes_resolve_spec.rb
+++ b/spec/features/merge_requests/diff_notes_resolve_spec.rb
@@ -201,7 +201,7 @@ feature 'Diff notes resolve', feature: true, js: true do
           expect(first('.line-resolve-btn')['data-original-title']).to eq("Resolved by #{user.name}")
         end
 
-        expect(page).to have_content('Last updated')
+        expect(page).not_to have_content('Last updated')
 
         page.within '.line-resolve-all-container' do
           expect(page).to have_content('0/1 discussion resolved')
diff --git a/spec/features/merge_requests/merge_when_build_succeeds_spec.rb b/spec/features/merge_requests/merge_when_build_succeeds_spec.rb
index c3c3ab33872..8eceaad2457 100644
--- a/spec/features/merge_requests/merge_when_build_succeeds_spec.rb
+++ b/spec/features/merge_requests/merge_when_build_succeeds_spec.rb
@@ -73,7 +73,7 @@ feature 'Merge When Build Succeeds', feature: true, js: true do
       expect(page).to have_button "Merge When Build Succeeds"
 
       visit_merge_request(merge_request) # refresh the page
-      expect(page).to have_content "Canceled the automatic merge"
+      expect(page).to have_content "canceled the automatic merge"
     end
 
     it "allows the user to remove the source branch" do
@@ -101,7 +101,7 @@ feature 'Merge When Build Succeeds', feature: true, js: true do
       expect(page).not_to have_link "Merge When Build Succeeds"
     end
   end
-  
+
   def visit_merge_request(merge_request)
     visit namespace_project_merge_request_path(merge_request.project.namespace, merge_request.project, merge_request)
   end